300pcs рм2,5 активированного угль заменяемой анти haze колодки для маски 5 слоя рм2,5 activate углерода фильтр заменяемого diy сделайся disa

300pcs pm2.5 activated carbon replaceable anti haze pads for mask diy make yourself disant sterilization ffa3599.1.the first layer: high efficient filter cloth filter the dust of micron.2.the second layer: meltblown cloth to filter industrial pollutants, automobile exhaust, second-hand smoke pollen allergies.3.the third layer: high efficient filter cloth filter benzene and a smaller function of filtering dust microns.4.the fourth layer: activated carbon cloth filter density, sma.